Offshore platforms in seismically active areas should be designed to service severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a...Offshore platforms in seismically active areas should be designed to service severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a dynamic analysis that accounts for nonlinear pile soil structures interaction effects. This paper summarizes the nonlinear dynamic analysis of a 3-D model of a typical Jacket-Type platform which is installed in Persian Gulf (SPD1), under simultaneously wave and earthquake loading has been conducted. It is assumed that they act in the same and different directions. The interaction between soil and piles is modeled by equivalent pile length theory. The structure is modeled by finite element method (Ansys Inc.). It be concluded that when the longitudinal components of the earthquake and wave are in different directions, an increase on the response of platform can be seen.展开更多
为保证超期服役海上采油平台的地震安全,通过对胜利埕岛油田海上平台结构构件、导管架焊缝、桩腿海生物、桩基冲刷、防腐系统、平台标高和倾斜度,以及结构振动特性方面的检测,结合平台建造竣工图纸和海洋工程地质调查资料,建立起平台结...为保证超期服役海上采油平台的地震安全,通过对胜利埕岛油田海上平台结构构件、导管架焊缝、桩腿海生物、桩基冲刷、防腐系统、平台标高和倾斜度,以及结构振动特性方面的检测,结合平台建造竣工图纸和海洋工程地质调查资料,建立起平台结构的有限元分析系统模型,按8度地震烈度对平台进行地震反应分析,根据API RP 2A规范进行平台结构强度校核。某平台校核结果表明,平台结构在地震载荷作用下的安全系数较高,可以满足抗震要求。展开更多
地震分析是海洋平台设计的重要部分,陆上地震设计的不断发展也促进了海洋工程结构设计方法的进步,API RP 2A 22nd和API RP 2EQ基于陆上抗震设计的经验引入了基于风险的地震设计方法。通过对API相关地震分析要求的升版背景和理论体系的研...地震分析是海洋平台设计的重要部分,陆上地震设计的不断发展也促进了海洋工程结构设计方法的进步,API RP 2A 22nd和API RP 2EQ基于陆上抗震设计的经验引入了基于风险的地震设计方法。通过对API相关地震分析要求的升版背景和理论体系的研究,梳理了API RP 2EQ的地震分析过程和设计要求与之前API相关要求的区别,并结合案例对不同ALE地震分析方法的结果进行了对比和讨论,便于工程人员设计参考。展开更多
文摘Offshore platforms in seismically active areas should be designed to service severe earthquake excitations with no global structural failure. In seismic design of offshore platforms, it is often necessary to perform a dynamic analysis that accounts for nonlinear pile soil structures interaction effects. This paper summarizes the nonlinear dynamic analysis of a 3-D model of a typical Jacket-Type platform which is installed in Persian Gulf (SPD1), under simultaneously wave and earthquake loading has been conducted. It is assumed that they act in the same and different directions. The interaction between soil and piles is modeled by equivalent pile length theory. The structure is modeled by finite element method (Ansys Inc.). It be concluded that when the longitudinal components of the earthquake and wave are in different directions, an increase on the response of platform can be seen.
文摘为保证超期服役海上采油平台的地震安全,通过对胜利埕岛油田海上平台结构构件、导管架焊缝、桩腿海生物、桩基冲刷、防腐系统、平台标高和倾斜度,以及结构振动特性方面的检测,结合平台建造竣工图纸和海洋工程地质调查资料,建立起平台结构的有限元分析系统模型,按8度地震烈度对平台进行地震反应分析,根据API RP 2A规范进行平台结构强度校核。某平台校核结果表明,平台结构在地震载荷作用下的安全系数较高,可以满足抗震要求。
文摘地震分析是海洋平台设计的重要部分,陆上地震设计的不断发展也促进了海洋工程结构设计方法的进步,API RP 2A 22nd和API RP 2EQ基于陆上抗震设计的经验引入了基于风险的地震设计方法。通过对API相关地震分析要求的升版背景和理论体系的研究,梳理了API RP 2EQ的地震分析过程和设计要求与之前API相关要求的区别,并结合案例对不同ALE地震分析方法的结果进行了对比和讨论,便于工程人员设计参考。
